REVOX B77 JUST VITAMIN C 20% Is an antioxidant serum for face and neck.Free Radicals can break down Collagen in the skin and allow sagging and wrinkle formation. Vitamin C is a powerful anti-aging ingredient, providing the skin with antioxidant protection against free radicals and external environmental factors. Vitamin C helps to reduce the appearance of wrinkles and dark spots’ intensity, clarifies and brightens the complexion.